根據(jù)非線性雙穩(wěn)系統(tǒng)只能在低頻段產(chǎn)生隨機(jī)共振的特性，提出了調(diào)制隨機(jī)共振方法，實現(xiàn)了在較寬的頻率范圍內(nèi)檢測微弱信號。理論分析和實驗結(jié)果表明：經(jīng)調(diào)制產(chǎn)生的低頻信號通過雙穩(wěn)系統(tǒng)的協(xié)同作用而形成的輸出信號，其能量和信噪比都有顯著提高，對強(qiáng)噪聲中的微弱信號有較強(qiáng)的檢測能力。采用該方法可進(jìn)一步開發(fā)雙穩(wěn)系統(tǒng)低頻段的信息資源，拓寬其應(yīng)用領(lǐng)域。

A modulated method based on stochastic resonance is put forward to detect the weak signals in rather broad frequency range，according to the characteristic of stochastic resonance produced in rather low frequency range in nonlinear bistable system．The theory analysis and experiment results show that the energy and SNR of the output signal modulated synergetic efect are both improved evidently，and the ability of detecting weak signals with
strong noise is enhanced．This method can be adapted to develop the information resources of nonlinear bistable system within low frequency range．